Conductor-clamp.



M. G. KENNEDY. CONDUCTOR CLAMP.

APPLICATION FILED AUG. 22, 1910.

1,101,802, Patented June 30,1914.

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WITNESSES: I INVENTOR I BY ATTORNEYS COLUMBIA PLANOORAPH co.. WASHINGTON, D. c,

M. G. KENNEDY.

CONDUCTOR CLAMP.

APPLICATION FILED AUG. 22, 1910.

1,101,802, Patented June 30, 1914.

2 SHEETS-$111531 2.

WITNESSES: INVENTOR M,M/%z4 ATTORNEYS conductor.

UNITED STATES PATENT OFFICE.

MATTHEW G. KENNEDY, OF SYRACUSE, NEW YORK, ASSIGNOR TO THE STATES COMPANY, OF SYRACUSE, NEW YORK, A CORPORATION OF CONNECTICUT.

CONDUCTOR-CLAMP.

To all whom it may concern:

Be it known that I, MATTHEW G. KEN- NEDY, of Syracuse, in the county of Onon daga and State of New York, have invented a certain new and useful Conductor-Clamp, of which the following is a specificatlon.

My invention relates to a clamp for securing an electric conductor to an lnsulator, and is particularly adapted for use where a glass or like insulator is employed and the conductor extends in a direction substan tially parallel to the axis thereof. One 1nstance of such an arrangement 1s found 1n the common street lighting installations wherein the main conductors are supported upon a cross-tree mountedon a pole, or mast, and a duplex conductor leads from the mains, down the side of the pole and then extends laterally to a lamp depending from the outer end of an arm which, at its inner end, is connected to the pole a distance be low the cross-tree. In suchcases it is customary to arrange, at spaced intervals along the pole, laterally extending brackets carrying at their outer ends vertically disposed insulators and to connect thereto the duplex My clamp is especially useful in making these connections. D

The object of the invention is to provide a clamp which is pleasing in appearance, durable and simple in construction, and

a highly efiicient in use.

In the accompanying drawings which illustrate my invention, Figure 1 is a view showing the invention used in the situation last outlined. Fig. 2 is a side elevation of the clamp applied to a conventional form of insulator. Fig. 3 is a plan view of the same. Fig. 4 is a detail view of one of the clamping members. Fig. 5 is a plan view of a modified form of clamp; and Fig. 6 is a detail view of the modified clamping mem- Specification of Letters Patent.

Application filed August 22, 1910.

Patented June 30, 1914.

Serial No. 578,327.

riphery of the insulator with which it is associated, and is straight in a plane at right angles to the first-named plane, and is of less thickness than the width of the annular groove in the insulator so as to rest therein. The clamping aw 2 is substantially oblong in outline and is curved in cross-section, is disposed with its greater length at right angles to the greater length of the intermediate portion, or in a plane parallel to the axis of the insulator herein designated A, and it is connected to the intermediate portion 1, by an offset, or neck, portion 3 integral with the parts 1 and 2, and joined to the inner edge of the jaw at one side of the middle thereof. The ear is designated 4, is integral with and extends at an angle from the rear end of the intermediate portion 1, and is provided with a suitable bolt receiving opening 5. A nut and bolt are associated with each pair of clamping members; the shank 6 of the bolt extending through the openings 5, the head 7 of the bolt cooperat ing with the ear 4 of one clamping member and the nut 8 cooperating with the ear of the companion member. In this form of my invention the clamping members are sub stantially duplicates of each other.

In applying the clamp, the intermediate portions of the companion members are engaged with opposite sides of the inner wall of the annular groove a, in the insulator A, the member being so positioned that a horizontal plane intersecting the middle of the groove (1, will be substantially coincident with the middle of the jaws 2, and when so assembled, the neck, or offset portions 3 will cross each other and the jaws 2 will be located directly opposite to each other as indicated in Figs. 2 and 3. The bolt is then placed in position in the ears, or having" been previously so placed, the cable or conductor 9 is inserted between the jaws 2 and then the nut 8 is screwed home which draws the ears 4 toward each other, and as the intermediate portions of the clamping members fulcrum upon the insulator A, the aws :2 will approach each other until the cable is securely gripped between the same, and the companion members are firmly engaged with the insulator.

The embodiment of my invention shown in Figs. 4 and 5 is like that previously described save that in lieu of the offset portions 3, one of the clamping members is provided with a web 10, or continuation of one side of its jaw 2, in which an opening 11 is located, and the intermediate portion of the companion clamping member is connected to the jaw thereof centrally of the inner edge of the same. In assembling this form of clamp, the intermediate portion of the member last described is passed through the opening 11 in the companion member.

To compensate for any material contraction of the clamping device, under variation in temperature, and so avoid injury to the insulator or conductor should such contraction occur, a suitable yielding medium may be interposed between the intermediate portions 1 and the insulator, or such yielding medium may be otherwise located, as be tween the head of the bolt and the adjacent wing 4. In Fig. 5, the yielding medium is shown in the form of disks or rings which are strung upon the parts 1 of the clamping members.

What I claim is:

1. The combination with an insulator having an annular peripheral groove and a conductor extending in a direction substantially parallel to the axis of the insulator, of a clamp for securing the conductor to the insulator, comprising two bars each having an intermediate portion curved in one plane and straight in a plane at right angles to the first, and of less thickness than the width of the insulator groove so as to lie therein, an ear integral with one end of each bar, a clamping jaw integral with the opposite end of each bar, and a nut and bolt coopcrating with the ears of companion members, substantially as and for the purpose described.

2. A clamp for connecting a conductor to a support comprising two members arranged to cross each other intermediate of their ends, cooperating clamping jaws located at corresponding ends of the members, and a bolt cooperating with the oppo site ends of the members the portions of the members between the last-named ends thereof and the aforesaid jaws being adapted to embrace the said support.

3. A clamp for connecting a conductor to a support comprising two members arranged to cross each other intermediate of their ends, cooperating clamping jaws located at corresponding ends of the members, and a bolt cooperating with the opposite ends of the members, the portions of the members intermediate the point of crossing thereof and the ends of the same engaged by the bolt being curved outwardly for engaging opposite portions of the support.

4. A conductor clamp of the class described, comprising two clamping members, I

each having two concave gripping faces of relatively large and small radius respec tively, united end to end and curved in reverse directions about parallel axes, said clamping members being arranged so that their corresponding concave sides face each other to simultaneously grip separate objects, and means for tightening said clamping members upon such objects.

5. A conductor clamping member having an intermediate portion curved in one plane and substantially straight in another plane, an ear at one end of said member, a jaw at the opposite end of said member for engaging a conductor extending substantially parallel to the support to which the clamp is attached, said member having an offset or neck portion connecting the intermediate part of the jaw at one side of the middle of the inner edge thereof to the intermediate portion of the member.

6. The combination with a support of, a clamping device for connecting a conductor thereto, said clamping device comprising bars embracing opposite sides of the support and disconnected from each other at corresponding ends on one side of the support, and a bolt engaging corresponding ends of the members on the opposite side of the support.

7. A twopart clamp, each part having two concave gripping faces of relatively large and small radius respectively, located side by side some distance apart and in parallelism, said parts being arranged so that corresponding concave sides face each other to grip separate objects and means connecting said parts for tightening and releasing them upon and from such objects.

8. A conductor clamp comprising companion members having portions for engaging opposite sides of a support, and integral jaws arranged in advance of such portions, said members crossing each other intermediate said jaws and engaging portions and being disconnected at said crossing point to admit of relative movement of the members, and means at the rear ends of the engaging portions for tightening the latter about the support and the aws about the conductor, substantially as and for the purpose described.

In testimony whereof, I have hereunto signed my name in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 11th day of Aug, 1910.

MATTHEW G. KENNEDY.

lVitnesses S. Davis, F. B. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

